Sales

Sale 1: Sold for 19 keys

https://backpack.tf/profiles/76561199037317509#!/compare/1602806400/1602892800

https://backpack.tf/profiles/76561199093117174#!/compare/1602892800/1602806400

Sale 2: Untraceable

https://backpack.tf/profiles/76561198070306770#!/compare/1596412800/1596499200

https://backpack.tf/profiles/76561198051639182#!/compare/1594425600/1596412800

Sale 3: Sold for 14 keys

https://backpack.tf/profiles/76561198928347702#!/compare/1599868800/1599955200

https://backpack.tf/profiles/76561198427517730#!/compare/1599523200/1600905600

Sale 4: Untraceable

https://backpack.tf/profiles/76561198176517715#!/compare/1597795200/1597968000

https://backpack.tf/profiles/76561198047941585#!/compare/1597708800/1597795200

Buyout was 25 keys

https://bot.tf/stats/listings/M1ZZDGG0

Sale 5: Bulk

https://backpack.tf/profiles/76561199063531190#!/compare/1602979200/1603065600

https://backpack.tf/profiles/76561198400207211#!/compare/1602979200/1603065600

Sale 6: Bulk

https://backpack.tf/profiles/76561198155733208#!/compare/1602115200/1602460800

https://backpack.tf/profiles/76561199037317509#!/compare/1602028800/1602115200

Sale 7: Untraceable

https://backpack.tf/profiles/76561198219468164#!/compare/1601078400/1601164800

https://backpack.tf/profiles/76561198967088046#!/compare/1600992000/1601164800

Sale 9: Untraceable

https://backpack.tf/profiles/76561198157176919#!/compare/1600905600/1600992000

https://backpack.tf/profiles/76561198219468164#!/compare/1600819200/1600905600

Sale 10: Sold for 14 keys

https://backpack.tf/profiles/76561198189867377#!/compare/1600732800/1601337600

https://backpack.tf/profiles/76561198157176919#!/compare/1600646400/1600732800

Sale 11: Untraceable

https://backpack.tf/profiles/76561198850274253#!/compare/1596153600/1596240000

https://backpack.tf/profiles/76561198189867377#!/compare/1596153600/1596240000

Buyout was 13 keys

https://bot.tf/stats/listings/46636310

Other exchanges, such as with bot alt.

https://backpack.tf/item/3831075318

Marketplace sales

https://marketplace.tf/items/tf2/95;5;u61

September

34.99 on September 2 (34.99/1.82 = 19~)

https://manic.tf/keyprice/?at=2020-09-02

34.99 on September 27 (34.99/1.87 = 19~)

https://manic.tf/keyprice/?at=2020-09-27

Current Classifieds

https://backpack.tf/classifieds?item=Engineer%27s%20Cap&quality=5&tradable=1&craftable=1&australium=-1&particle=61&killstreak_tier=0

https://gyazo.com/10a17c2bf2c202cc44534cda61e31678

Summary

Sales at 13, 14, 14, and 19.

Marketplace sales at 19 and 19.

Conclusion

13 and 14 are far below buyers, and going to consider them low outliers here.

Going with 19 here.

Take it easy.